from collections import OrderedDict

from apps.goods.models import *


def get_categories():
    categories = OrderedDict()
    channels = GoodsChannel.objects.order_by('group_id', 'sequence')
    # 获取频道组数据
    for channel in channels:
        group_id = channel.group_id
        if group_id not in categories:
            categories[group_id] = {"channels": [], "sub_cats": []}

        # 获取类别数据
        cat1 = channel.category
        cat1.url = channel.url
        categories[group_id]["channels"].append(cat1)

        # 构建当前类别的子类别
        for cat2 in cat1.subs.all():
            cat2.sub_cats = []
            for cat3 in cat2.subs.all():
                cat2.sub_cats.append(cat3)
            categories[group_id]['sub_cats'].append(cat2)

    return categories

